螺山水文站采用流量权重系数推求断沙的探讨

悬移质输沙率及断面平均含沙量测验目前主要采用的方法是以部分流量加权法求得,该法需在含沙量测验的同时进行流量测验.通过对螺山水文站多年实测悬移质输沙率资料的分析计算,得到各取样垂线间部分流量权重系数,再利用垂线平均含沙量与垂线间部分流量权重系数的计算即可得到断面平均含沙量.该法能实现含沙量测验与流量测验异步,减少流量测次,降低生产成本,能更好地控制含沙量的变化过程.

Research of Flow Weighting Coefficient Ascertaining Average Sediment Concentration at Cross-section in Luoshan Hydrometric Station

The method of partial flow weighting coefficient has been used to test suspended sediment dis- charge and average sediment concentration at cros-section, which measures sediment concentration and flow at the same time. Trough analysis of suspended sediment discharge data in the past few years, partial flow weighting coefficient is obtaine＆ After the calculation between vertical average sediment concentration and vertical partial flow weighting coefficient, average sediment concentration at cross-section has been worked out. The above method has realized asynchronization of sediment concentration and flow tests, reduced the number of test times, lowered the cost and better controlled the variation of sediment concentration.